package com.hmall.order.service.impl;

import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.hmall.common.client.ItemClient;
import com.hmall.common.client.UserClient;
import com.hmall.common.dto.Address;
import com.hmall.common.dto.Item;
import com.hmall.order.mapper.OrderMapper;
import com.hmall.order.pojo.Order;
import com.hmall.order.pojo.OrderDetail;
import com.hmall.order.pojo.OrderLogistics;
import com.hmall.order.pojo.RequestParams;
import com.hmall.order.service.IOrderService;
import com.hmall.order.utils.UserHolder;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

@Service
public class OrderService extends ServiceImpl<OrderMapper, Order> implements IOrderService {

    @Autowired
    private ItemClient itemClient;
    @Autowired
    private UserClient userClient;
    @Autowired
    private OrderDetailService orderDetailService;
    @Autowired
    private OrderLogisticsService logisticsService;
    /**
     * 提交订单
     *
     * @param requestParams
     * @return
     */
    @Transactional
    @Override
    public Long createOrder(RequestParams requestParams) {
        Order order = new Order();
        //创建订单业务比较复杂，流程如下：
        //- 1）根据雪花算法生成订单id
        //- 2）商品微服务提供FeignClient，实现根据id查询商品的接口

        //- 3）根据itemId查询商品信息
        Item item = itemClient.queryById(requestParams.getItemId());
        //- 4）基于商品价格、购买数量计算商品总价：totalFee
        Long price = item.getPrice();
        Integer num = requestParams.getNum();
        long totalFee = price * num;
        //- 5）封装Order对象，初识status为未支付
        order.setTotalFee(totalFee);
        order.setPaymentType(requestParams.getPaymentType());
        order.setUserId(UserHolder.getUser());
        order.setStatus(1);
        //- 6）将Order写入数据库tb_order表中
        this.save(order);

        //- 7）将商品信息、orderId信息封装为OrderDetail对象，写入tb_order_detail表
        OrderDetail orderDetail = new OrderDetail();
        orderDetail.setOrderId(order.getId());
        orderDetail.setItemId(item.getId());
        orderDetail.setNum(requestParams.getNum());
        orderDetail.setName(item.getName());
        orderDetail.setPrice(item.getPrice());
        orderDetail.setSpec(item.getSpec());
        orderDetail.setImage(item.getImage());
        orderDetailService.save(orderDetail);

        //- 8）将user-service的根据id查询地址接口封装为FeignClient
        //- 9）根据addressId查询user-service服务，获取地址信息
        Long addressId = requestParams.getAddressId();
        Address address = userClient.findAddressById(addressId);
        //- 10）将地址封装为OrderLogistics对象，写入tb_order_logistics表
        OrderLogistics orderLogistics = new OrderLogistics();
        orderLogistics.setOrderId(order.getId());
        BeanUtils.copyProperties(address, orderLogistics);
        logisticsService.save(orderLogistics);

        Long orderId = order.getId();
        //- 11）在item-service提供减库存接口，并编写FeignClient
        //- 12）调用item-service的减库存接口
        try {
            itemClient.upudateStock(requestParams.getItemId(), requestParams.getNum());
        } catch (Exception e) {
            throw new RuntimeException("库存不足!");
        }

        return orderId;
    }
}
